Seriously how much?! Window cleaner

[MrsPear]

I am in shock but I’m not sure if I have just lost touch with reality. We live in a three bed terrace which is 60s build in zone 6 London. We have three windows at the front and three windows at the back plus sliding doors (one fixed panel and one door) - max 2m wide.

The window cleaner wants to charge £22.

Is that right?

£22 in the SE for a four bed detached with large conservatory (doesn't do the conservatory roof, just windows). Was £20 until about 18 months ago. Comes every other month although not very consistently!